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<p>In the 4.0 release, the Berkeley DB C++ API has been changed to use the ISO
standard C++ API in preference to the older, less portable interfaces,
where available. This means the Berkeley DB methods that used to take an
ostream object as a parameter now expect a std::ostream. Specifically,
the following methods have changed:</p>
<pre class="programlisting">DbEnv::set_error_stream
Db::set_error_stream
Db::verify</pre>
<p>On many platforms, the old and the new C++ styles are interchangeable;
on some platforms (notably Windows systems), they are incompatible. If
your code uses these methods and you have trouble with the 4.0 release,
you should update code that looks like this:</p>
<pre class="programlisting">#include <iostream.h>
#include <db_cxx.h>
void foo(Db db) {
db.set_error_stream(&cerr);
}</pre>
<p>to look like this:</p>
<pre class="programlisting">#include <iostream>
#include <db_cxx.h>
using std::cerr;
void foo(Db db) {
db.set_error_stream(&cerr);
}</pre>
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